Display screen or portion thereof with transitional graphical user interface



The patent file contains at least one drawing executed in color. Copies of this patent with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.

FIG. 1 is a view of a first image in a first embodiment of a display screen or portion thereof with transitional graphical user interface showing our new design;

FIG. 2 is a second image thereof; and,

FIG. 3 is a third image thereof.

The broken lines in the figures depict environmental subject matter and form no part of the claimed design.

The outermost broken lines in the figures show a display screen or portion thereof and form no part of the claimed design.

The appearance of the transitional graphical user interface sequentially transitions between the images shown in FIGS. 1-3. The process or period in which one image transitions to another forms no part of the claimed design. 

CLAIM We claim the ornamental design for a display screen or portion thereof with transitional graphical user interface, as shown and described. 